公开(公告)号：US11229074B2

公开(公告)日：2022-01-18

申请号：US16319039

申请日：2018-01-09

Applicant: Telefonaktiebolaget LM Ericsson (publ)

Inventor： Peter Ramle ,  Qian Chen ,  Peter Hedman ,  Josefin Karlsson ,  Lasse Olsson ,  Stefan Rommer ,  Mikael Wass

IPC: H04W8/08 ,  H04W76/15 ,  H04W76/25

Abstract: Embodiments here in relate to methods for message handling performed by an Access and Mobility Management function, AMF, and a User Equipment, UE, as well as a corresponding AMF and UE. Particularly, embodiments herein relate to methods for handling service requests performed by an Access and Mobility Management function, AMF, and a User Equipment, UE, as well as a corresponding AMF and UE.

公开(公告)号：US11178603B2

公开(公告)日：2021-11-16

申请号：US16611711

申请日：2018-05-04

Applicant: Telefonaktiebolaget LM Ericsson (publ)

Inventor： Daniel Nilsson ,  Qian Chen ,  Stefan Rommer ,  Paul Schliwa-Bertling

IPC: H04W48/18 ,  H04W76/11 ,  H04W8/08 ,  H04W8/22 ,  H04W12/06 ,  H04W60/00 ,  H04W84/04

Abstract: The invention relates to methods and devices for enabling relocation of Access and Mobility Management Functions (AMFs). In an aspect of the invention a method performed by a Non-3rd Generation Partnership Project (3GPP) Interworking Function (14, N3IWF) enabling a wireless communication device (10) to attach to a core network (100) over non-3GPP access, to facilitate re-location of the wireless communication device (10) from an Access and Mobility Management Function (13, AMF) currently serving the wireless communication device (10) over non-3GPP access to the core network (100), to a target AMF (21) which is to serve the wireless communication device (10) over 3GPP access to the core network (100). The method comprises receiving (S119a), from the target AMF (21), a request to redirect any further signalling of the wireless communication device (10) from the currently serving AMF (13) to the target AMF (21); and redirecting any signalling of the wireless communication device (10) to the target AMF (21).

公开(公告)号：US20210219264A1

公开(公告)日：2021-07-15

申请号：US17056515

申请日：2019-05-15

Applicant: Telefonaktiebolaget LM Ericsson (publ)

Inventor： Qian Chen ,  Paul Schliwa-Bertling ,  Hans Bertil Rönneke ,  Roland Gustafsson

IPC: H04W68/02 ,  H04W76/27 ,  H04W72/12

Abstract: Embodiments of a method performed by a radio access node for network scheduled User Equipment (UE) transition to connected mode and corresponding embodiments of a radio access node are disclosed. In some embodiments, a method performed by a radio access node comprises receiving: (a) a notification request from an Access and Mobility Management Function (AMF) to retrieve reachability information for a UE or (b) downlink data to be communicated to the UE. The method further comprises, upon receiving either (a) or (b), determining that the UE is in an inactive state and is currently unreachable. The method further comprises sending information to the AMF that notifies the AMF that the UE is currently unreachable. The information comprises information that indicates that RAN paging of the UE is scheduled or scheduling assistance information. Embodiments of method performed by an AMF and corresponding embodiments of an AMF are also disclosed.

公开(公告)号：US20210185585A1

公开(公告)日：2021-06-17

申请号：US17268396

申请日：2019-08-13

Applicant: Telefonaktiebolaget LM Ericsson (publ)

Inventor： Qian Chen ,  Juying Gan ,  Stefan Rommer ,  Ann-Christine Sander ,  Paul Schliwa-Bertling

IPC: H04W36/32 ,  H04W36/00 ,  H04W8/08 ,  H04W48/16

Abstract: System comprising a mobility management entity, MME, a first Radio Access node, RAN (eNB) offering Long Term Evolution, LTE, access, and a second radio access node, RAN (gNB) offering New Radio, NR, access; a user entity, UE, supporting both Long Term Evolution, LTE, and New Radio, NR, Radio Access Technology, RAT.

公开(公告)号：US20210120462A1

公开(公告)日：2021-04-22

申请号：US17254935

申请日：2019-06-13

Applicant: Telefonaktiebolaget LM Ericsson (publ)

Inventor： Qian Chen ,  Yong Yang

IPC: H04W36/00 ,  H04W8/26 ,  H04W8/02 ,  H04W48/18

Abstract: A method for a target mobility management entity and a target mobility management entity for executing the method in a core network to communicate network function (NF) utilization information with a source mobility management entity during a change of mobility management entity are disclosed. The method comprises: receiving at least one old NF identifier (ID) from the source mobility management entity that corresponds to an old NF entity serving a user equipment (UE); determining to either use the at least one old NF ID or to use at least one new NF ID that corresponds to a new NF entity of a same NF type as the old NF entity; and communicating, to the source mobility management entity, information that indicates to the source mobility management entity whether the target mobility management entity uses the at least one old NF ID or uses the at least one new NF ID.

公开(公告)号：US10917867B2

公开(公告)日：2021-02-09

申请号：US16492279

申请日：2017-12-22

Applicant: Telefonaktiebolaget LM Ericsson (publ)

Inventor： Peter Ramle ,  Qian Chen ,  Josefin Karlsson

IPC: H04W60/00 ,  H04W76/27 ,  H04W8/08

Abstract: A UE is configured such that, when in MICO mode, the UE does not transmit certain messages (e.g., Service Request, periodic registration update message) whenever there is a risk that the certain message will not be routed to the UE's serving AMF. In some embodiments, the network (e.g., serving AMF) indicates to the UE in MICO mode an area (parts of, or the entire PLMN) that is covered by the serving AMF, the Within Serving AMF (WSA) area. While the UE is within the indicated WSA area, the UE in MICO mode may continue to use periodic registration area update or Service Requests (instead of the more extensive mobility registration update procedure) as there is no risk of addressing a new AMF in that area.

公开(公告)号：US20200170071A1

公开(公告)日：2020-05-28

申请号：US16344925

申请日：2019-02-19

Applicant: Telefonaktiebolaget LM Ericsson (publ)

Inventor： Gunnar Mildh ,  Qian Chen ,  Mohammed Yazid Lyazidi ,  Ulf Mattsson ,  Hans Bertil Rönneke ,  Paul Schliwa-Bertling ,  Magnus Stattin

IPC: H04W80/08 ,  H04L29/08 ,  H04W76/11 ,  H04W76/16 ,  H04W12/00 ,  H04W8/18 ,  H04W76/12

Abstract: Exemplary embodiments include methods performed by a cellular Internet of Things, CIoT, user equipment, UE, for transmission of data in a communication network comprising a radio access network, RAN, and a core network, CN. Embodiments include sending, to an Access and Mobility Management Function, AMF, a request to establish a small-data user-plane, SDUP, data session. Embodiments can also include receiving a response indicating that the requested SDUP data session is established. The response can include an identifier associated with a user-plane function, UPF, within the CN, that supports the established SDUP data session. The response can also include an SDUP security configuration for communication between the UE and the CN during the established SDUP data session. Embodiments can also include subsequently communicating user data, associated with the established SDUP data session, with the UPF via a serving node in the RAN. Other embodiments include complementary methods performed by AMFs and serving nodes, as well as UEs and network nodes configured to perform the exemplary methods.